To be perfectly honest,
I have been dreading penning this review for sometime. No, not because I
am somehow at a loss for meaningful words: precisely the opposite – what
do I leave out and not say! The Zu Definition Pros (the "old"
model) have managed over the past year or so to realign my auditory
universe (as well as those who have come to listen with intellectual
honesty) in more ways then one. Oddly enough, apart from the
cheerleaders at 6moons, hardly any mainstream publication has picked up
on what I shall henceforth term the "Zu-Factor". Is it because the Zu
crew is so anti-establishment? Is it because they are young (mid 30s and
younger) and therefore automatically too inexperienced to be taken
seriously? Is it because they play real music (non-audiophile) at trade
shows, demos, and such? Is it because they don't play the marketing game
of "mine is bigger then yours?" Apart from rampant educated speculation,
I don't know the answer; what I do know is that indeed there is some
sort of vacuum in the mainstream audio press regarding Zu, especially
considering the stellar success they have had over the past few years:
modestly beginning with their Zu Cable line and now culminating and
coinciding with their recent name change to Zu Audio.

Zu-Factor

Earlier I mentioned the
Zu-Factor—what is it you ask? I suppose it could be any one thing or a
combination of many: fact is, Zu is cool. Zu is hip. Zu is good. Do you
Zu? Zu breaks barriers: Zu's top of the line automotive finished
full-range loudspeaker sells for $11,000. Zu's meat and potato (nearly
full-range with an output available to mid 30s) Druid sells for
(adjusted for an updated automotive finish) $3400. Zu products are made
in America (Ogden, Utah). Zu offers a 60-day home trial, no questions
asked, money back guarantee for any of their loudspeakers. Zu speakers
just look cool (did I mention that already?)! Zu is based on sound
engineering principals, not some whirl-world Twilight Zone 5th
Element theory. Most importantly: the guys at Zu are honest, dependable,
and hard working peeps. You dig? Read on dude!

The story so far…

In the beginning there
was Druid. And Druid was good.

What the Druids do and
do very well is perhaps most easily ascribed as dynamic realism and
realistic tonality. Everything else, as they say, simply flows from
those two pillars. While the Zu "sound" apparently remains as polarizing
as ever (people either love 'em or hate 'em), I don't see how anyone
could sit through a listening session and come out empty handed. Sure,
they are not the most resolving speaker out there, nor are they as airy,
open, and hyper detailed as my previous benchmark, the Marten Dukes. But
very few speakers I know of can come close to what they pack in terms of
dynamic agility, correct tonality, sheer power, and real imagery. In the
end, every speaker is a compromise of some sort: what you gain here, you
lose there. No speaker is all things to all people. You simply pick the
one with the fewest shortcomings and enjoy that which gives you the most
satisfaction. Conversely, ten engineers will give you ten different,
though possibly equally intellectually honest answers as to what the
optimal loudspeaker should be. Live, love, be merry, and enjoy your
music. Life's too short.

Having enjoyed the Druid
MkIV model for quite some time, Zu's co-conspirator Sean Casey and I
agreed that it was time to move onto the final coup de grace: the
Definition Pro, a product very much shrouded in mystery.

To make a long story
short, the $9000 Pros were never really an official product for those of
us interested in home audio fidelity. Instead, you had to twist the arms
of Sean and his alter ego Adam Decaria to get a pair made. Why? Simple
really. The Definition Mk1 and Mk1.5 are full range loudspeakers, with
each having four actively powered 10" subs per channel. For most
people, and under most circumstances, this was more then enough to
handle your wildest dreams of full-range sound. They later added a
volume knob on the Mk1 (subsequently all Mk1 were converted to Mk1.5
status) to provide bass output adjustment to meet your preference and
room acoustics; however, the clever boys at Zu knew there was more to be
had. A true full-range speaker (like the Definition) is a special kind
of beast: bass frequencies are difficult to tame, let alone from a
loudspeaker capable reaching, God's honest, 16Hz. We are not talking
pseudo port activated "full-range"—no Sir: this is the real deal, the
real McCoy. We are talking about a loudspeaker capable of pressurizing
your room to levels you won't dare tell your wife, landlord, or
neighbor. The caveat with that sort of 10 octave coverage is that you
invariably end up with loudspeaker/room interaction problems. Sure,
having an output level control for your subs is helpful and may even
work very well under certain circumstances, but to truly nab the bull by
the cohones would be to use an outboard EQ/crossover with separate
amplifiers.

Fair enough you say, but
let's face it: most 'philes aren't up to the knowledge required to set
up such an elaborate system, not to mention its added cost and
complexity. Hence, Zu covered their tracks by offering the Definition
Pro version to a select group of peeps; call it the VIP club, call it
expert audiophiles, call it engineers, call it what you wish. Fact of
the matter is that having lived with these actively EQ'd and powered
Definition Pros for almost a year; I simply can't see myself ever being
without such a speaker system.

Druid is good, but
Definition is state of the art; pixel-peeping sucks.

Anticipating the
Definition Pros was like waiting for the hottest date of your life to
show up. Seriously. I called all my friends and gushed over the prospect
of what was to come. Hi-Fi is cool. Hi-Fi via the Definition Pros is the
equivalent of putting on a 6-point racing harness in a Ferrari F430,
setting the Manettino to LC (Launch Control), kicking up 6000 rpm, and
pulling the right paddle shifter. What happens next can cause
irreparable damage to your psyche. It is as if someone had strapped you
inside the largest man-made slingshot; you get pushed inside your seat
with a vehement force as you hurtle towards 60 mph in the blink of an
eye—or a click less then 4 seconds. I'd say that is a fair description
of what the Definition Pros actively equalized to 16Hz did for me. My
downstairs neighbor must have called our landlord a dozen times
complaining about various memorabilia falling off his shelves as I
listened to Yello, Kruder & Dorfmeister, or Mose Allison at 110dB. Yep,
I'd say that's about 3.7 seconds to 60.

What the Druids did
well, the Definition Pro improved upon in spades, and then some. The
then some was air, resolution and well, err definition. What they
added to top-end of the Druids, was simply an even higher sense of
acoustic realism and authentic auditory illusion. Since the Definition
Pros have arrived, I laugh at some of these so-called "full-range"
speakers out there. Full-range? Ok, but do they do 16Hz? Ooops. Didn't
think so. Never mind 16Hz. Can you crank them to 110 on the decibel
scale (provided you have the power, though at 101dB efficiency you will
need a lot less then you think) without any sign whatsoever of
compression: dynamic or otherwise? Can they, at the flick of your
remote, portray those same images realistically at 70dB without falling
apart at the seams like so many speakers do? In other words, are they
capable of retaining music in its full glory, or are they simply
the equivalent of "pixel-peepers" in the dark of the night when the
lights are off and the Gremlins come to wake?

Pixel-peeping is my new
favorite term. It exemplifies perfectly what so many 'philes chase and
chase and chase some more. Music has become secondary: they want to hear
the fart behind the guy in the 4th row, 7 seats to the left.
They love the sound of cow's farting. Hey, a cricket makes noise too!
Golly well—tell 'ya what bud, knock yourself out, 'cause music it ain't. Betty van Stumpsing. Beehhh who? What, you don't know Betty van Stumpsing? Man, where
'ya been? She's a sucker of a musician, but boy, I
said BOY, do her farts sound good! Friends, Romans, countrymen, yes
indeed pixel-peeping is the equivalent to never being satisfied with
your camera's resolution. Pictures? Wait, you mean I ought to look at
the picture? What picture? All I see is 24 tetra pixels and it ain't
enough!

A Ferrari F430 for my
living room

Well, I suppose one must
come to terms with what one aspires to own, have, and want. I want a
music system capable of making me believe I am driving that Ferrari F430
in my living room. Honestly, that's my idea of a Hi-Fi system. In due
time I shall return to racing automobiles, but for now, music is what
keeps me sane. The Definition Pros are loudspeakers that work for me in
that sense: they are ultra-quick, ultra-dynamic, ultra-tonal, and
ultra-cool. They have the optimal amount of resolution—they play my
eclectic taste of music from classical to pop to rock with an equal
fortitude and that certain sense of ease. I have heard speakers
offer different perspectives of the same theme: more this, less that.
And there are many great loudspeakers out there, but I challenge you to
show me any one that has the qualities of the Definition Pros at
$9000. Or at $20,000. Or $40,000. I am not sure they exist. Fact is that
the Definition Pros are the highest performing full-range loudspeakers
per footprint available—guaranteed.

Even so, there is no
best loudspeaker, much less "world's best" as one manufacturer (there
have no doubt been many before) recently claimed. It all boils down to
personal preference. One visit to a live music session ought to show you
how far away we are from the original if that's the benchmark you use.
Having said that, improvements and further optimizations are always
possible without completely throwing out the original concept. A new
shock absorber here, a magnesium rim there, reprogrammed and revamped
engine management, it all ads up to precious seconds being knocked off
the lap clock. Thus, if you wish to keep all other things equal, you
look for the recently released F430 Scuderia. It retains the stigma of
the F430 whilst adding further significant performance improvements.

An updated Definition in
the wings: a new reference?

Happy and content that
this was it, an email from Dotore Casey came my way sometime in April of
this fine year "call me ASAP. We need to talk…" Hrmm… Il Dotore asking
for my audience in such a direct way, I dared wonder what this could be?
"Hey Danny, do you want to be the first to review the new Definition
Mk2?" Gulp, Gasp, Goodness and holy Gazonga, where's the damned oxygen
tank when I need it? Umm say what? The Definition is getting an upgrade?
"Well, truth is, the Definition has been around for a several years, and
as is normal in a product's lifecycle, it has reached its end. A new
replacement is coming your way." I immediately fired back with the usual
suspect questions: "What's different, what's new and when do I get
them?"

The answers came at
different times during the past months, as if to build anticipation of
what was to come. Fast-forward to the beginning of this month; a nice
FedEx dude calls and says he has two large boxes for me. Definition MkII
has arrived. Goodie, goodie, I can't wait to hook these pups up, strap
my 6 point racing harness on and pull that paddle shifter (again and
again and again…).

The nuts and bolts, meat
and potatoes: ladies and gents, the Definition Mk2

The Definition Mk2 looks
nearly identical in size and shape to the Definition Mk1/1.5/Pro. Unless
you have both next to one another, you won't be able to tell the
difference. But that's where the similarities end. Everything is new.
Everything has been redesigned from the ground up. The emperor really
has new clothes.

The previous
generation's MDF has been scrapped in favor of something more rigid. Far
more rigid. The cabinet is now made of a ¾" thick superstructured
tuckernut/poplar/maple plywood core with a polyester/composite gel
coated shell. The bass drivers (all four per channel) have been
significantly upgraded, and as a result of this new superstructure, are
now literally anchored to the cabinet. The highpass filter on the
supertweeter has been upgraded, as have the former polypropylene
capacitors in favor of the best paper/oil (Mundorf silver/oil, ran
battery style) versions available. The bass array setup has been totally
revamped and now actually features a separate section (smaller for the
upper two, larger for the bottom two) for each pair of the four 10"
woofers in the back. Perhaps most importantly, the Definition Mk2 is
also the previous generation's Mk1.5 and Pro rolled into one. You heard
right: the Def 2s have a built in 120-watt class A/B amp to power the
bass arrays, yet can be converted to fully active status at a moments
notice—provided you have the spare coin to do them right. You wouldn't
want your F430 Scuderia running off 87 octane now would you? About the
only thing retained from the previous generation are the superb Cardas
binding posts. Oh and yes, the Definitions are still made in Ogden Utah.
That's America for those of you out in Rio-Linda.

All in all, this isn't
your modders upgraded loudspeaker. No sir, this is a complete ground up
redesign with a goal of retaining the original's design perimeters.
Naturally, this sort of thang doesn't come for free—considering the
wherewithal, the price point has been raised to an insignificantly
higher figure of $11,000, which now includes your choice of three glossy
hand rubbed automotive finish colors (this alone was a 2k up-charge on
the previous model).

Visually, the quality of
the finish has been dramatically improved. Mine were delivered in (you
guessed it) Ferrari glossy red, with custom twin 10" blacked out rims
err… drivers. "Holy crap, they look stunning!" Was the first thing I
said when I unpacked them.

Definition: redefined.

Within ten minutes of
connecting the new fully burned in Definition Mk2s, I knew that the
previous flagship's lap times had been reset by a new fastest lap. Take
a deep breath and relax, the improvements are immediately noticeable.
These center most noticeably on (you guessed it) dynamic realism and
overall improved definition: midrange pep, top end extension, and
resolution. Let's recap quickly: dynamic realism centers around the
belief that if a loudspeaker can portray the intricacies of music from
loud to soft, top to bottom, start/stop, it will therefore make music
sound more real. Recall my comment earlier about live vs. recorded
sound; the most identifying mark of a live performance is precisely
that: dynamic range or realism. Not having to pass through a recording
chain and subsequent playback chains the realism of an actual instrument
playing before you is breathtaking.

With proper
amplification behind the front main drivers and the rear woofer array,
the Definition Pro was an already outstanding performer. Until that is
you hear the Definition Mk2. Bass appears tighter, more integrated as a
whole and simply more natural. The attack/sustain/decay relationship of
a note has been heightened and refined to new levels. Yello's "Planet
Dada" (Flamboyant mix) off their latest album The Eye, is a
perfect example of such refinement. Whereas the Definition Pro gave you
the whole picture, the Definition Mk2 adds a few more layers of
refinement. The subterranean synth notes are much more integrated with
the rest, i.e. there is now absolutely zero lag in the attack, sustain,
and decay of the rear woofer arrays in relationship to the hideously
quick and super fast front drivers. This was a major goal the Zu guys
had set out to achieve. 0-60 in 3.5s? You betcha!

No matter what amplifier
I put upstream, the very fine Brinkmann Vollverstaerker, a superb Luxman
MQ88, my original Quad IIs, an Fi 2A3, Yamamoto or even the rather cute
Luxman SQ100 NeoClassico, the Defs let each of these amps breath with
their respective sonic signatures, strengths, and weaknesses et all.

"Ionization", off
Varese's two disc Decca CD compilation, is another perfect example of
how various improvements manifest themselves. The track starts off
rather slow and distant, yet full of musical textures and information.
This piece, written entirely for non-pitched percussive instruments, is
an exemplary demo of Varese's technique. A piano here, a glockenspiel
there, a sudden drum roll exploding dynamically; each of the instruments
is layered with definition, realism, and almost surgical pin-point
imaging. Simply stunning and a must have recording for anyone serious
about percussion. The Definition Pros are somewhat vague and far less
differentiating of this spectacle: think brute force vs. scientific
precision. The glockenspiel for example, rather dominant throughout the
performance, now appears to have taken on a new life; a relief like
three-dimensional pictures unfolds in the far away aural landscape
before you. If that's not pinpoint imaging and realism, I don't know
what is! Similarly, the top-end extension, no doubt due in part to the
new filter caps, appears much more refined, airy, and relaxed.

Male vocalists—or the
total and utter absence of any crossover mangling in the hyper critical
midrange—are a defacto dominant theme amongst all Zu loudspeakers. I
vividly recall hearing Sinatra, Martin, or Cash for the first time on
the Druids: simply lifelike, or more real sounding then I had ever heard
before. What's better then a crossover dividing up the music amongst
multiple drivers? The answer is no crossover and a single driver! Here
again the Definition Pro was absolutely top notch. In my room, the magic
trio (Sinatra, Martin, and Cash) never sounded more engaging and
effortless. The Definition Mk2 improves upon that by further integrating—layering—the vocals and music. Everything appears in clearer focus
while being more authoritative (real?).

If riding an F430 at
breakneck pace through your favorite Malibu canyon road is the idea of
an ultimate car control, then listening to Meeting by the River,
a Kavi Alexander/Water Lily Acoustics recording must be the audiophile
equivalent. The intricate interplay of only three or four instruments
within the confines of Santa Barbara's St. Anthony's Seminary Chapel is
an exemplary demo track for the Definition Mk2s. Transient responses are
off the charts. The dynamic swings, multi-layered instrumental colors,
and tones are a test for any loudspeaker, yet, the new Zu loudspeakers
don't even begin to break a sweat. Perfect downshifts, you hit the apex
and slam the throttle—until you are ready to do it again at the next
turn. That about sums up the experience you get when the Definition Mk2s
play this track.

Conclusion… wait… that
would imply an ending: a new beginning, in a living room near you.

So far, so good, but
guess what: the Definition Mk2s do have shortcomings—shock, gasp, awe!
Well certainly, recall the following: a speaker, any speaker, is a set
of predetermined compromises. There are speakers (my old reference, the
Marten Dukes come to mind) that give you a truly clinical, what goes in
must come, out performance. There are speakers that will sound more
resolving in the sense that resolution is a multi-edged sword; not
necessarily referring to resolution parse. While on paper that sounds
like a great feature. In life it could be the opposite. Too much
information sometimes isn't that good of a thang. Pixel-peeping anyone?

The Definition Mk2s are
quite remarkable. They retain the essence that makes Zu great
while adding on a layer of refinements not heard from the previous king.
They are far more forgiving with regards to setup and placement; they
marry the Pro model's benefits of extreme room integration with the
Mk1.5's ease of use, high-fidelity, and all. They are the quintessential
upgrade: you feel right at home, yet are immediately aware of their
newfound guts and glory. It's like getting in the F430 Scuderia when you
already own the F430. The story sticks: I verified and checked with an
owner.

The versatility of the
Definition Mk2s will further be expanded upon with the rumored Zu
(designed and manufactured) integrated digital EQ and Hypex powered
amplifier module. This module will essentially replace two more boxes
from your set-up: the Rane PEQ55 parametric EQ and your choice of
separate power amplifier. If tall tales of eight foot men are to be
believed, this module will also contain an E.T. inspired calling home
feature. Through the power of the internet, the Zu crew will be able to
check your EQ settings and adjust them, if necessary, for better
performance. That sounds like the proverbial icing on the cake. Think of
it: fully integrated 10 octave wideband speakers with a footprint not
larger then your typical monitor. No need to take out the extra mortgage
on the house or touch the kid's college fortune cookie fund. The value
and performance conscious 'phile has a new king to crown. Who's hosting
the party? Danny Kaey